Spray gun



Jan. 30, 1934. C c HOPKINS 1,945,147

SPRAY GUN Filed April 29, 1932 INVENTOR cu l m 0 Hopkins molp suwrm ATTORNEY Patented Jan. 30, 1934 UNITED STATES 1,945,147 SPRAY GUN Claude 0. Hopkins, Fruitport, Mich., assignor to Rex Research Corporation, Toledo, Ohio Application April 29, 1932. Serial No. 608,187

3 Claims.

This invention relates to improvements in spray guns with detachable receptacles.

The objects of the invention are,

First, to provide improved means of detachably attaching the receptacle to the spray gun.

Second, to provide such a receptacle which when filled with spray material, such as insecticide, will be refillable only with great difficulty when empty; that is, in effect non-refillable.

Third, to provide an improved separable connection in the spray pipe for such a structure.

Objects relating to details of construction and operation will appear from the detailed description to follow. The invention is defined in the claims. Preferred embodiments of the invention are illustrated in the accompanying drawing, in which:

Fig. 1 is a side elevation view of the spray gun and receptacle embodying the features of my invention.

Fig. 2 is an enlarged detail longitudinal central sectional elevation of the structure appearing in Fig. 1, showing the details of substantially all parts, the cap being partially screwed off.

Fig. 3 is an enlarged detail vertical central section of the parts of the screw cap nozzle and device appearing in Fig. 2.

Fig. 4 is a detail plan view taken on line 4-4 of Figs. 2 and 3, showing details of the nozzle closing structure.

The parts of the drawing will be identified by numerals of reference which are the same in all views.

1 is the receptacle. 2 is the usual form of cylinder piston spray gun with discharge aperture 21. 3 is the screw-threaded nozzle of the can. 4 is the screw cap corresponding to said nozzle secured to the under side of the discharge portion of the spray gun. The nozzle 3 is provided with a flange 31 apertured at the center. 6 is the plug for insertion into the top of the nozzle. It is a sheet metal stamping with central depression 61 and with notches 62 between the depressed portion and the flange to form vent openings. The outwardly projecting flange 63 is disposed centrally and secured in place on the nozzle by solder 64.

The spray tube is divided into a lower section 5 and an upper section 8 with a separable joint therebetween. The lower tube section 5 fits with a drive fit into the plug 6 and is retained by solder 51. A gasket member 7 is in the depressed portion of the plug and surrounds the upper end of the spray tube section 5. Secured to the end of the spray gun is the upper section 8 of the suction pipe or spray tube therefor, the up per end of which is opposite the discharge aperture 21. The lower end of the tube 8 is expanded into a flange 81 which rests upon the gasket 7 and completes the joint between the two sections of the spray pipe.

In practice the can 1 is filled with spray fluid, the plug 6 is then inserted into the aperture in the flange of the nozzle, and is then soldered in place.

I desire to state that my improved combined spray gun with detachable receptacle can be modified in various ways. I show a special gasket at the joint between the pipe sections, but it could of course be dispensed with by carefully fitting the parts. I show the plug soldered in place, but it might be otherwise secured. I have shown the nozzle flange at the top of the nozzle. It might be located anywhere along its length.

It will be seen that the container can be shipped with an ordinary cap and as soon as the cap is removed the gun can be screwed in place, joining the ends of the sections of the spray pipe and making the same complete.

I desire to claim the invention in its specific form illustrated and also broadly, as pointed out in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination of a cylinder piston spray gun having a discharge aperture and a detachable receptacle in cooperative relation, a screwthreaded nozzle on the receptacle, with an inwardly-projecting flange at the top, a corresponding screw-threaded cap on the spray gun, a flanged plug with depressed recess at the center and an outwardly-projecting flange having vent perforations within the flange, secured by solder to said nozzle flange, a spray tube made up of separable upper and lower sections the lower section of the spray tube being centrally disposed and secured in said plug, and extended at its lower and toward the bottom of the receptacle and a gasket in the recess at the center of said plug, the upper section of said spray tube being secured to the discharge end of the gun, having its lower end extending within the said screw cap and expanded into a flange and adapted to contact with the said gasket to close the joint between the upper and lower sections of said spray tube.

2. The combination of a cylinder piston spray gun having a discharge aperture and a detach- 11D able receptacle in cooperative relation, a nozzle on the receptacle, with an inwardly-projecting flange at the top, a corresponding cap on the spray gun with a separable joint portion to connect to said receptacle nozzle, a flanged plug with depressed recess at the center and an outwardly-projecting flange having vent perforations within the flange, secured by solder to said nozzle fiange, a spray tube made up of separable upper and lower sections, the lower section of the spray tube being centrally disposed and secured in said plug and extended at its lower end toward the bottom of the receptacle, and a gasket in the recess at the center of said plug, the upper section of said spray tube being secured to the discharge end of the gun, having its lower end extending within the said cap and expanded into a flange and adapted to contact with the said gasket to close the joint between the upper and lower sections of said spray tube.

3. The combination of a cylinder piston spray gun having a discharge aperture and a detachable receptacle in cooperative relation, a nozzle on the receptacle with an inwardly-projecting flange at the top, a corresponding cap on the spray gun with a separable joint portion to connect to said receptacle nozzle, a flanged plug with an outwardly-projecting flange having vent perforations secured by solder to said nozzle flange, a spray tube made up of separable upper and lower sections, the lower section of the spray tube being centrally disposed and secured in said plug and extended at its lower end toward the bottom of the receptacle, the upper section of said spray tube being secured to the discharge end of the gun, having its lower end extending within the said cap and adapted to close the joint between the upper and lower sections of said spray tube.

CLAUDE C. HOPKINS. 

